how to do calibration for glass bottle for BOD
Homework Answers
Take a sample bottle and fill it completely with water in this way that there is no air present then the dissolved oxygen is fixed by using series of reagents that form an acid compound that is titrated.Titrationinvolves drop by drop addition of reagents which neutralize the acid compound and cause a change in colour of the solution.The point at which the colour change of the soloution is the endpoint and it is equivalent to the amount of dissolved oxygen in the sample.The sample is usually fixed and titrated in the field at the sample site as a calibarated solution.
If a bottle made of Pyrex glass is used instead of the ordinary glass bottle, how...
If a bottle made of Pyrex glass is used instead of the ordinary glass bottle, how will this affect the accuracy of your results? Explain.
Assuming the density of glass is 1.5g/mL (8.0 g/mL calibration weights), what is the buoyancy corrected...
Assuming the density of glass is 1.5g/mL (8.0 g/mL calibration weights), what is the buoyancy corrected mass of the bottle + lid (c)? The mass of the bottle + lid is 20.7392 please answer asap
In order to sterilize a 20.0-g glass baby bottle, the temperature of the glass must be...
In order to sterilize a 20.0-g glass baby bottle, the temperature of the glass must be raised from 16.5°C to 95.0°C. How much heat transfer is required to sterilize the bottle? The specific heat of glass is 840 J/(kg C)
5. The following data is for a BOD determination run on a raw sewage sample incubated...
5. The following data is for a BOD determination run on a raw sewage sample incubated for 5 days at 20°C in the dark; calculate the BOD5,20. Raw sewage contains a sufficient population of bacteria to conduct a BOD test. Therefore, this is an unseeded sample. Data: BOD bottle volume mL raw sewage added to BOD bottles DO, in bottle containing waste and dilution water DO in bottle containing waste and dilution water 300 mL 10.00 mL 7.70 mg/L 2.35...
Please answer #5 a through d . The air inside a 180 mL glass bottle is...
Please answer #5 a through d
. The air inside a 180 mL glass bottle is at 1.0 atm and 25 °C when you close it. You carry the glass bottle with you up a mountain where the air pressure is 0.75 atm and the temperature is 5 °C. a. The air pressure on the outside of the glass bottle has decreased. What happens to the volume of air inside of the bottle? Explain your thinking. top of the mountain...
How do you calibrate a sensor for static calibration?
How do you calibrate a sensor for static calibration?
De constant kiday"). 8. A standard BOD test is run using seeded dilution water. In one...
De constant kiday"). 8. A standard BOD test is run using seeded dilution water. In one bottle, the water sample is mixed with seeded dilution water giving a dilution of 1:30. Another bottle, the blank, contains just seeded dilution water. Both bottles begin the test with DO at the saturation value of 9.2 mg/L. After five days, the bottle containing waste has DO equal to 2.5 mg/L while that containing just seeded dilution water has DO equal to 8 mg/L....
2-13 A glass bottle of nominal capacity 250 cm1 is filled brim full of water at...
2-13 A glass bottle of nominal capacity 250 cm1 is filled brim full of water at 20°C. If the bottle and contents are heated to 50°C, how much water spills over? (For water, B 0.21 x 10-3K 1. Assume that the expansion of the glass is negligible.)
2. To determine the BOD in an industrial wastewater sample, a seeded BOD analysis was conducted;...
2. To determine the BOD in an industrial wastewater sample, a seeded BOD analysis was conducted; data are summarized in the table below. Ten mL of wastewater was added per 300 mL bottle to determine the dissolved oxygen demand of the aged, settled wastewater seed (test A). The seeded test bottles (test B) contained 2.5 mL of industrial wastewater and 1.2 mL of seed wastewater a) What is the five-day BOD in this industrial wastewater? What is the k-value using...
A glass bottle of soda is sealed with a screw cap. The absolute pressure of the...
A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.80 x 105 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 3.60 x 10-4 m2, obtain the magnitude of the force that the screw thread exerts on the cap in order to keep it on the bottle. The air pressure outside the bottle is one atmosphere.
In order to sterilize a 20.0-g glass baby bottle, the temperature of the glass must be raised from 16.5°C to 95.0°C. How much heat transfer is required to sterilize the bottle? The specific heat of glass is 840 J/(kg C)
5. The following data is for a BOD determination run on a raw sewage sample incubated for 5 days at 20°C in the dark; calculate the BOD5,20. Raw sewage contains a sufficient population of bacteria to conduct a BOD test. Therefore, this is an unseeded sample. Data: BOD bottle volume mL raw sewage added to BOD bottles DO, in bottle containing waste and dilution water DO in bottle containing waste and dilution water 300 mL 10.00 mL 7.70 mg/L 2.35...
Please answer #5 a through d
. The air inside a 180 mL glass bottle is at 1.0 atm and 25 °C when you close it. You carry the glass bottle with you up a mountain where the air pressure is 0.75 atm and the temperature is 5 °C. a. The air pressure on the outside of the glass bottle has decreased. What happens to the volume of air inside of the bottle? Explain your thinking. top of the mountain...
De constant kiday"). 8. A standard BOD test is run using seeded dilution water. In one bottle, the water sample is mixed with seeded dilution water giving a dilution of 1:30. Another bottle, the blank, contains just seeded dilution water. Both bottles begin the test with DO at the saturation value of 9.2 mg/L. After five days, the bottle containing waste has DO equal to 2.5 mg/L while that containing just seeded dilution water has DO equal to 8 mg/L....
2-13 A glass bottle of nominal capacity 250 cm1 is filled brim full of water at 20°C. If the bottle and contents are heated to 50°C, how much water spills over? (For water, B 0.21 x 10-3K 1. Assume that the expansion of the glass is negligible.)
2. To determine the BOD in an industrial wastewater sample, a seeded BOD analysis was conducted; data are summarized in the table below. Ten mL of wastewater was added per 300 mL bottle to determine the dissolved oxygen demand of the aged, settled wastewater seed (test A). The seeded test bottles (test B) contained 2.5 mL of industrial wastewater and 1.2 mL of seed wastewater a) What is the five-day BOD in this industrial wastewater? What is the k-value using...
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